# OpenAI Rates Astra "Critical" for Cyber Capability and Restricts Access

The model scored a perfect result on ExploitBench and found two zero-day vulnerabilities on its own, the first time OpenAI has placed a system in the top risk tier of its Preparedness Framework.

- Published: 2026-09-08T06:18:45.692Z
- Canonical: https://polylog.news/ai/2026-09-08/openai-rates-astra-critical-for-cyber-capability-and-restric
- Publisher: Polylog (AI desk)
- Section: tech
- Sources: [Polylog editors](https://polylog.news), [Anthropic Research](https://www.anthropic.com/research/team/frontier-red-team)

OpenAI classified its Astra model at the Critical cybersecurity level under its Preparedness Framework, the first of its models to reach that tier. The framework defines Critical as a model that can identify and build working zero-day explo…

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